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Chemistry
Chemistry
College
Which carboxylic acid can be combined with an alcohol to form the ester shown below?
Chemistry
Middle School
How does the atmosphere make Earth warmer?
Chemistry
High School
The main goal of science is to
Chemistry
College
g If the pressure of each gas is increased at constant temperature until condensation occurs, which gas will condense at the lowest pressure
Chemistry
College
What is the mass number of Carbon12, which has 6 protons and 6 neutrons?
Chemistry
High School
Radioactive isotope X has a half-life of 500,000 years. This isotope may be found in some types of volcanic rocks. A particular sample of volcanic rock taken from a layer that covered up some of the earliest known human-like footprints contains 0.125 mg of isotope X. The volcanic rock sample originally contained 8.00 mg of isotope X. How long ago were these footprints made. I need the equation. Thanks. please I am stuck on this question. PLEASE
Chemistry
High School
HELPPA monatomic ion always have one unit of charge. (+1 or -1) on the speciestrue or false
Chemistry
College
Which of the following is the metric system based on?
Chemistry
High School
Two or more atoms that have been chemically combined arecalled a
Chemistry
High School
Jimmy's science textbook reflects blue light. What color is the book?
Chemistry
College
why does adding salt to ice make it melt faster
Chemistry
High School
This is a property of matter that can be identified without changing the identity of the substance PLEASE ANSWER QUICKLY!
Chemistry
High School
which of the following molecules has only two non binding pairs (long pairs) of electrons in its lewis structure?a)O2b)CH4c)NH3d)H2s
Chemistry
College
Electron spin around the nucleus in specific paths called?
Chemistry
High School
as distance from nucleus increases , energy of shells decreases, correct the wrong statement
Chemistry
High School
What is the role of gravity in the solar system?
Chemistry
High School
1. Define max and explain why it is desirable to do the experimental procedure at max? 2. Around what absorbance would you expect the max to be with each color solution? (Blue, green, red, yellow) 3. A pipet is used to make the solution dilutions in lab. Suppose in making the dilution, additional distilled water is accidentally added. Will the concentration of the solution be higher or lower that disered? Explain.
Chemistry
College
For the combustion of methane, CH4(g) + 2 O2(g) CO2(g) + 2 H2O(l) H = -213kcal/molHow many kilocalories of energy are released from 5.0 mol of methane?How many moles of methane are needed to give 100. kcal heat?
Chemistry
College
What is the first step when using a microscope?A. Place the microscope slide on the stageB. Plug the microscope in and turn it onC. Switch to the low power objective lensD. Secure the slide to the stage clips
Chemistry
College
Which element has more metallic properties?Lead or Germanium
Chemistry
High School
The expression of the speed of light can be written as: (C =
Chemistry
College
I will mark brainliest as soon as there are two answers! Please be quick, I'm timedA mineral forms in water heated by magma inside Earth.Which statement best describes this mineral?The mineral formed through evaporation.The mineral crystallized from molten material.The mineral formed when a hot water solution cooled.The mineral likely has all the same properties as the surrounding rock.
Chemistry
High School
What is the activation energy of a reaction?
Chemistry
Middle School
Carlos listed some advantages and disadvantages of using nonrenewable resources.Which best describes Carloss error?
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